title: A chip-scale, telecommunications-band frequency conversion interface for quantum emitters.
abstract: We describe a chip-scale, telecommunications-band frequency conversion interface designed for low-noise operation at wavelengths desirable for common single photon emitters. Four-wave-mixing Bragg scattering in silicon nitride waveguides is used to demonstrate frequency upconversion and downconversion between the 980 nm and 1550 nm wavelength regions, with signal-to-background levels > 10 and conversion efficiency of ≈ -60 dB at low continuous wave input pump powers (< 50 mW). Finite element simulations and the split-step Fourier method indicate that increased input powers of ≈ 10 W (produced by amplified nanosecond pulses, for example) will result in a conversion efficiency > 25 % in existing geometries. Finally, we present waveguide designs that can be used to connect shorter wavelength (637 nm to 852 nm) quantum emitters with 1550 nm.
authors.forename: Imad
authors.initials: I
authors.lastname: Agha
authors.forename: Serkan
authors.initials: S
authors.lastname: Ates
authors.forename: Marcelo
authors.initials: M
authors.lastname: Davanço
authors.forename: Kartik
authors.initials: K
authors.lastname: Srinivasan